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FURNACE. ,254.. Patented June 28,1898.

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F. E. SWIFT.

I FURNACE. No. 606,254. Patented June 28,1898.

Q Q I I m I 5% 3}} I IF; ig M 33 I 5?: 2; 3Q Q -1 EEE i ii K o i3 3] Q- i h 6 I i I gwvemtgz I VHMeoQc/J iz yzg FRANK E. SWIFT, OF WASHINGTON, IOWVA.

, FURNACE,

SPECIFICATION forming part of Letters Patent No. 606,254, dated June 28, 1898.

Application filed July 80, 189 '7. Serial No. 646,437; (No model.)

To whom it may concern.-

Be it known that l, FRANK E. SWIFT, a citizen of the United States, residing at Wash exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a furnace. of that class or description which is provided with an interior roasting-table to receive coal or slack, which is subjected to ahigh degree of temperature for expelling the gases, which are carried to a kiln or other place to be burned, and the coke resulting from such roasting being fed to the fire or combustion chamber, forming the fuel therefor. By this means a very hot and effective fire is produced with an equalization of the heat in all parts of the kiln.

The object of the present invention is to provide means for feeding the coal or slack to the roasting bench or table and for feeding the coke from such table or bench to the fire or combustion chamber, as well as to generally improve the construction of the furnace whereby to secure important advantages with respect to efficiency in use.

The invention consists in the novel construction and combination of parts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a front elevation of a furnace constructed in accordance with my invention. Fig. 2 is a vertical section of the same. Fig. 3 is ahorizontal section on the line a: :10, Figs. 2 and 6. Fig. 4 is a similar view on the liney 1 Fig. 5 is a horizontal section on the line 3 3, Fig. 2, with the outline of a kiln in dotted lines adjacent to the furnace. dinal sectional view.

In the said drawings the reference-numeral 1 designates the furnace-wall, which may be of any suitable form and size, preferably-rectangular, as shown, although it may be of any other shape found convenient or desirable. This main Wall 1 has preferably the horizonydtally-curved arch 2 formed therein as a part Fig. 6 is a longitu thereof, and at the rear side of the main wall 1 is the upright wall 3, provided with an opening 4, located adjacent to and communicatingwith the kiln 5.

Within the furnace are a grate 6 somewhat belowQthe opening 4, forming an ash-pit 7, and a the or combustion chamber 8 above the grate,provided with a door 9. Located above said fire or combustion chamber is a roasting bench or'table 10, also provided with a door 12 and formed with a number of central openings 13. Located on this bench or table is a damper 14, formed with openings 16, coinciding with the openings 13. This damper is provided with handles 17, extending through the front of the furnace, by which it may be reciprocated.

Formed in the arch 2 are a number of openings 18, and located above said arch is a hopper 19 to receive coal or slack. At the bot tom of this hopper is a reciprocating damper 20, provided with openings 21, corresponding with the openings 18, and having handles 23 extending through the front of the furnace, by which it is operated.-

The side walls of the furnace are formed with fines 24, having at their front ends outlet-openings 25 in the front Wall of the furnace to admit air thereto. At their inner sides adjacent to the top of the grate are lateral holes or openings 26.

The operation is as follows: A fire is start ed on the grate and a supply of coal or slack is fed to the roasting bench or table by means of the damper 20.- This coal or slack soon becomes highly heated, and the gas expelled therefrom escapes through the opening 4 into the kiln, and combining with the products of combustion from the fire-chamber, which also escape into the kiln through said opening, a

very intense heat is provided which will be equally distributed throughout the kiln. Air is supplied through the air fines and openings to promote combustion. After the gas has been so expelled the resultant coke is fed to the grate by reciprocating the damper 14 back and forth. i

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- In a furnace of the character described, the per having inclined Walls located above the combination of the upper and lower arches upper arch, substantially as described. 10

dividing the furnace into acoinbnstion-cham- In testimony whereof I affix my signature her and a roasting-chamber and said arches in presence of two Witnesses.

5 formed With openings, and the said chambers FRANK E. SWIFT.

formed with openings leading to a kiln, the WVitnesses: reciprocating dampers for opening and clos- A. S. FOLGER,

ing the openings in said arches, and the hop- W. H. BUTTERFIELD. 

